1. What is Single Phase Transformer?

A single phase transformer is an electrical device that transfers electrical energy between circuits through electromagnetic induction. It operates on single-phase AC power and is commonly used in residential and light commercial applications.

2. How Does the Calculator Work?

The calculator uses the single phase transformer formula:

Where:

• \( kVA \) — Apparent power in kilovolt-amperes
• \( I \) — Current in amperes (A)
• \( V \) — Voltage in volts (V)

Explanation: This formula calculates the apparent power rating of a single phase transformer based on the current and voltage values.

3. Importance of kVA Calculation

Details: Accurate kVA calculation is crucial for proper transformer sizing, electrical system design, load balancing, and ensuring efficient power distribution without overloading the transformer.

4. Using the Calculator

Tips: Enter current in amperes and voltage in volts. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between kVA and kW?
A: kVA represents apparent power (voltage × current), while kW represents real power (actual power consumed). The ratio between them is the power factor.

Q2: Why is transformer rating in kVA instead of kW?
A: Transformers are rated in kVA because their capacity depends on the current they can handle, which is affected by both real and reactive power components.

Q3: What factors affect transformer sizing?
A: Load requirements, power factor, ambient temperature, altitude, and future expansion needs all influence transformer sizing decisions.

Q4: Can this formula be used for three-phase transformers?
A: No, three-phase transformers use a different formula: \( kVA = \frac{\sqrt{3} \times I \times V}{1000} \)

Q5: What is typical efficiency of single phase transformers?
A: Modern single phase transformers typically have efficiencies between 95-99%, depending on the load level and transformer design.